1974–75 South-West Indian Ocean cyclone season

Cyclone season in the Southwest Indian Ocean SWI 1975 1974-1975 South-West Indian Ocean cyclone season summary.jpg 23 December 1974 22 April 1975 Gervaise 951 65 10 10 8 6 5 2 9 total 1972–73, 1973–74, 1974–75, 1975–76, 1976–77 1974–75 Australian region cyclone season 1974–75 South Pacific cyclone season The 1974–75 South-West Indian Ocean cyclone season was an average cyclone season. The season officially ran from November 1, 1974, to April 30, 1975. Systems Tropical Disturbance Adele SWI December 23 December 24 Adele 1974 track.png swiodisturbance 1005 Adele existed from December 23 to December 24. Intense Tropical Cyclone Blandine SWI Blandine 1975 track.png Blandine 1975-01-08.jpg January 6 January 12 95 980 Blandine existed from January 6 to January 12. Tropical Cyclone Camille SWI Camille 1975 track.png MozambiqueChannelHUJanuary181975.gif January 10 January 21 80 995 This system formed southeast of the Seychelles on January 7 before becoming disorganized while interacting with northern Madagascar. The system redeveloped as a hurricane-force cyclone in the northern Mozambique Channel on January 16 before moving southeast into Madagascar on January 19.Mariners Weather Log 154 Hurricane Alley Dick DeAngelis 19 3 Intense Tropical Cyclone Robyn–Deborah SWI Robyn-Deborah 1975 track.png RobynDeborahJanuary241975.gif January 14 January 24 100 960 This system existed from January 14 to January 24. Tropical Depression Elsa SWI Elsa 1975 track.png January 25 January 27 30 1000 Elsa existed from January 25 to January 27. Tropical Disturbance Fernande SWI Fernande 1975 track.png February 1 February 1 swiodisturbance 30 This storm lasted for only 18 hours on February 1. Intense Tropical Cyclone Gervaise SWI Gervaise 1975 track.png MaritiusReunionHUFebruary71975.gif February 1 February 10 105 120 951 The origins of Cyclone Gervaise were in early February 1975 from a circular area of convection, or thunderstorms, located in the Intertropical Convergence Zone southwest of Diego Garcia in the south-west Indian Ocean. The system organized as it moved generally to the southwest, a trajectory it would maintain for several days due to a subtropical ridge to its southeast, and an area of low pressure near the Mascarene Islands. On February 2, the Mauritius Meteorological ServicesMétéo-France's meteorological office in Réunion (MFR) is the official Regional Specialized Meteorological Center for the South-West Indian Ocean, tracking all tropical cyclones from the east coast of Africa to 90° E. The Mauritius Meteorological Office is responsible for naming storms in the eastern east of 55° E.Philippe Caroff April 2011 Operational procedures of TC satellite analysis at RSMC La Réunion World Meteorological Organization 2013-10-27 http://www.wmo.int/pages/prog/www/tcp/documents/RSMCLaReunionforIWSATC.pdf PDF 4–5 etal named the storm Gervaise. Two days later, the storm attained hurricane status, or maximum sustained winds of at least 120 km/h mph on 5.Global tropical/extratropical cyclone climatic atlas Hurricane Gervaise, 1–9 February 1996 National Climatic Data Center February 3, 2019 SWI 1975_6 Late on February 5, Gervaise passed about 100 km (60 mi) southeast of St. Brandon. Continuing southwestward, the cyclone struck Mauritius on February 6, with the calm of the eye lasting for three hours. That day, the American-based Joint Typhoon Warning Center (JTWC)The Joint Typhoon Warning Center (JTWC) is a joint United States Navy – United States Air Force task force that issues advisories for storms in the basin. estimated peak winds of 130 km/h mph on 5.Kenneth R. Knapp Michael C. Kruk David H. Levinson Howard J. Diamond Charles J. Neumann 2010 The International Best Track Archive for Climate Stewardship (IBTrACS): Unifying tropical cyclone best track data 1975 Tropical Cyclone Gervaise (1975033S11073) Bulletin of the American Meteorological Society February 3, 2019 1975033S11073 On February 7, Gervaise passed about 130 km mi 5 on southeast of Réunion. The track shifted to the south and southeast over time, steered by a passing cold front. On February 10, Gervaise dissipated within the cold front. Gervaise first affected St. Brandon, producing wind gusts of over 100 km/h mph on, along with heavy rainfall. Cyclone Gervaise killed 10 people during its passage of Mauritius. Its strongest wind gusts occurred after the passage of the eye, peaking at 280 km/h mph on at Mon Desert. Heavy rainfall affected the island for several days, reaching 674 mm in on at Grosse Roche. The high winds knocked down power lines, radio transmission with Vacoas for 24 hours, and many crops. About 25% of the island's sugar cane crop was lost. The storm damaged several houses, leaving thousands homeless. The cyclone last affected Réunion, where it produced wind gusts of 180 km/h mph on. Gervaise also dropped heavy rainfall on the island, reaching 548 mm in on at Plaine des Cafres. It caused substantial damage to properties, vegetation and wildlife. Moored yachts around the coast were washed hundreds of yards inland in places due to the storm surge and in the Mauritian capital Port Louis, a cargo ship of ca. 10,000 tonnes was washed up on to the quay. 34 injured, 3,706 homeless. Tropical Cyclone Helose SWI Helose 1975 track.png Helose 1975-02-22.jpg February 19 February 26 80 985 Helose existed from February 19 to February 26. Severe Tropical Storm Ines SWI Ines 1975 track.png March 9 March 19 60 55 985 Ines existed from March 9 to March 19. Severe Tropical Storm Junon SWI Junon 1975 track.png April 18 April 22 1005 50 35 Junon existed from April 18 to April 22. Season effects |- | Norah || 19741101 November 1 – 4, 1974 || bgcolor=#STS|6 Severe tropical storm || bgcolor=#STS|50 kn km/h mph out on 5 on || bgcolor=#STS|988 hPa inHg on 4 on || Christmas Island, Cocos Island || 0 None || 0 None ||1974 Tropical Cyclone Norah (1974301S08105) International Best Track Archive for Climate Stewardship May 8, 2022 1974301S08105 |- | Adele || 19741101 December 23 – 24, 1974 || bgcolor=#DI|1 Tropical disturbance || bgcolor=#DI|000 Not specified || bgcolor=#DI|000 Not specified || Christmas Island, Cocos Island || 0 None || 0 None ||1974-1975 Tropical disturbance season in the southwestern Indian Ocean Météorologie Maritime fr 1976 87 40–48 0222-5123 http://bibliotheque.meteo.fr/exl-php/docs/ILS_DOC/237310/doc00027158__PDF.txt#page=49 Saison 1974-1975 des perturbations tropicales dans l'océan indien du sud-ouest |- | Blandine || 19750106 January 6 – 12, 1975 || bgcolor=#ITC|8 Intense tropical cyclone || bgcolor=#ITC|95 kn km/h mph out on 5 on || bgcolor=#ITC|980 hPa inHg on 4 on || None || 0 None || 0 None || |- | Camille || 19750110 January 10 – 21, 1975 || bgcolor=#TC|7 Tropical cyclone || bgcolor=#TC|80 kn km/h mph out on 5 on || bgcolor=#TC|995 hPa inHg on 4 on || None || 0 None || 0 None || |- | Robyn–Deborah || 19750114 January 14 – 24, 1975 || bgcolor=#ITC|8 Intense tropical cyclone || bgcolor=#ITC|100 kn km/h mph out on 5 on || bgcolor=#ITC|965 hPa inHg on 4 on || None || 0 None || 0 None || |- | Elsa || 19750125 January 25 – 27, 1975 || bgcolor=#TD|2 Tropical depression || bgcolor=#TD|30 kn km/h mph out on 5 on || bgcolor=#TD|000 Not specified || None || 0 None || 0 None || |- | Fernande || 19750201 February 1 – 1, 1975 || bgcolor=#DI|1 Tropical disturbance || bgcolor=#DI|30 kn km/h mph out on 5 on || bgcolor=#DI|000 Not specified || None || 0 None || 0 None || |- | Gervaise || 19750201 February 1 – 10, 1975 || bgcolor=#ITC|8 Intense tropical cyclone || bgcolor=#ITC|105 kn km/h mph out on 5 on || bgcolor=#ITC|951 hPa inHg on 4 on || None || 0 None || 0 None || |- | Helose || 19750219 February 19 – 26, 1975 || bgcolor=#TC|7 Tropical cyclone || bgcolor=#TC|80 kn km/h mph out on 5 on || bgcolor=#TC|985 hPa inHg on 4 on || None || 0 None || 0 None || |- | Ines || 19750309 March 9 – 19, 1975 || bgcolor=#STS|6 Severe tropical storm || bgcolor=#STS|60 kn km/h mph out on 5 on || bgcolor=#STS|985 hPa inHg on 4 on || None || 0 None || 0 None || |- | Junon || 19750418 April 18 – 22, 1975 || bgcolor=#STS|6 Severe tropical storm || bgcolor=#STS|50 kn km/h mph out on 5 on || bgcolor=#STS|1005 hPa inHg on 4 on off || None || 0 None || 0 None || |- 11 systems 105 kn km/h mph out on 5 951 hPa inHg 4 on See also Tropical cyclones Atlantic hurricane seasons: 1974, 1975 Eastern Pacific hurricane seasons: 1974, 1975 Western Pacific typhoon seasons: 1974, 1975 North Indian Ocean cyclone seasons: 1974, 1975 Notes References 2 1970 South-West Indian Ocean cyclone yes 1974 y South-West_Indian_Ocean Category:South-West Indian Ocean cyclone seasons